Diffuser



FIG. 1 is a perspective view of a diffuser according to our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

Broken lines and the area within the broken lines show portions of thediffuser that form no part of the claimed design.

CLAIM I claim the ornamental design for a diffuser, as shown anddescribed.